Tetrafluoroethylene → Ethanesulfonic acid, 1,1,2,2-tetrafluoro-, sodium salt (1:1)

Temperature

120 °C

The sodium sulphite (201 g) was dissolved in water (600 mL) and taken in a 1000 mL Hastelloy reactor. Tetrafluoroethylene (150 g) was added to the reactor at −130° C. The temperature of the reactor was increased to 120° C. and maintained at 120° C. for 12 hours. The reactor was cooled to 25° C. and unreacted tetrafluoroethylene was vented off. The water of the reaction was removed from reaction mixture by azeotropic distillation to obtain a reaction mass. The reaction mass was extracted with hot ethanol using soxhlet apparatus. The ethanolic solution was concentrated to obtain pure sodium tetrafluoroethane sulfonate (100 g).

1. customtaken in a 1000 mL Hastelloy reactor
2. temperaturemaintained at 120° C. for 12 hours
3. temperatureThe reactor was cooled to 25° C.
4. customThe water of the reaction was removed from reaction mixture by azeotropic distillation
5. customto obtain a reaction mass
6. extractionThe reaction mass was extracted with hot ethanol using soxhlet apparatus
7. concentrationThe ethanolic solution was concentrated

ORD record

ord-429142376b494d088084b38f5ed80ddc

Source dataset

uspto-grants-2016_06

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US09376379B2